Molding apparatus



(No Model.) n 4 2 Sheets-#Sheet 1.

W. 8. WITHERS.

, MULDING' APPARATUS.

No. 393,804. Patented Deo. 4, 1888.

@vih/Amoco, l S18/vauro?,

WALTERWlTl-l ERS.

2 Sheets-Sheet 2.

(No Model.)

. W. S.`W'ITIIERS.

MOLDING APPARA'IUS.

Patented Dec. 4, 1888.

Wasi-mg' con. u.' C.

UNITED STATES PATENT OFFICE. f

WALTER s. WITHERS, oE ATLANTA, GEORGIA,

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 393,804, dated December4, 1888.

Application led May 5, 1388. SerialNo. 272,971. (No model.)

To all whom it may conccrn':

Be it known that I, IVALTER S. VITHERS,

a citizen of the United States, and a resident of Atlanta, in the countyof Fulton and State of Georgia, have invented a new and usefulImprovement in Molding-Machines; and I do hereby declare the followingto be a full, clear, and exact description of the same, such as wouldenable others skilled in the art to whichy it appertains to make and usethe same," reference bein had to the accompanying drawings, and toletters or Iigures marked thereon, which form a part of thisspecification.

This invention relates to apparatus for In ak ing sand Inolds for metalcastings, the object being to so improve the Ineans for Inaking suchmolds as to facilitate the operation.

In the accompanying drawings, Figure l is a plan showing the back sideof the plate and the patterns and the arms by which they'are attached toa common and central hub. This ligure also shows the frame to which theplate is attached and trunnions by which the frame, with the plate andone part of the flask, Inay be turned over when used in a machine forramming and handling the flask. Fig. 2 is a vertical section showing theplate and its frame, the patterns and runners, and the flask and sand.Fig. 3 is a perspective of a casting such as would be produced from amold made by the apparatus shown in the several figures. Fig. 4 is aview of the face of the plate, showing the patterns and gates. Fig. 5 isa section through a plate' upon which one side of mold may be rammedwhenever the patterns have one side sufficiently plain to permit it, asis the case in the form of casting shown in Fig. Fig. 6 is a verticalcentral section through the two parts of the mold and thecontaining-flask. Fig. `7 is a side view of one of the pins, showing thescrew by which it is attached to the plate. Fig. S is a perspective viewof one of the plates and pins united. Fig. 9 is a section of bushing S.

In the iigures, like reference-marks indicating corresponding parts inthe several views, B is the drag, and C is the cope, made of theordinary form, except that the pins l) are in the drag and the plates care in the cope. It is immaterial, however, which part the pins or holesare in so long as they correspond with the pins and holes in the plateswith is, I use the apparatus shown in Figs. l, 2, and 6o 4 for the sidehaving a very irregular form, and that shown in Fig. 5 for the side thatis so plain as to permit it.

The apparatus shown in Figs. l, 2, and 4 and the pattern shown inconnection therewith produce a drag like that shown in Fig.

G, sand being rammed against it in the usual way. This part of theapparatus consists of a frame, F., of a hard metal, preferably brass,attached to a box-shaped frame, F, of any suit- 7o able material. Theframe E has on and extending the entire length of its inner edge atongue, e, as Ishown in Fig. 2. In the frame E is cast a plate, G, of asoft or easily-fused metal, that incloses that portion of the patternwhich is not to vbe molded in the drag, the face of this plate comingexactly to the parting-line on the patterns. \Yhatever form the patternmay have the face of this plate should meet the parting-line and theedge of 8o the rearward extensions that, moving the plate, should be ofsuch form as will permit them to be drawn vertically or parallel to eachother through the plate G, that is cast around them. Patterns for thegates or runners g may be cast integrally with the plate G.

The plate G is of a metal more easily melted than that of'which theframe E is made, in order that the plates Inay be readily Inelted outand replaced by others without injury to 9o the frame or other parts ofthe apparatus, by reason of which it may be used successively inconnection with patterns of various designs.

To attach the patterns to the central hub7 95 H, the screws J areinserted in the patterns, as shown in Figs. l and 2, and stand about ashigh as the loops in the ends of the arms K, that are attached to thecentral hub, H. \Vith the patterns in their places and the hub and Iooarms in proper position, Inetal, M, is poured into the loops until theyare filled. The surfaces against which the Inetal, M, comes may beroughened or provided with holes or be tinned, and the metal, M, be ofsuch kind as will unite with the tinned surfaces.

The screw N passes through a nut, n, in the cover O, and is connectedwith the hub by means ol' the head fl and the washer 71. l'tispreferable to have the guiding-pins P attaehed t the arms that carry thepatterns and slide through holes in the eover to lessen the wearing elthe patterns and the. holes in the plate through which they pass. Yhenbut a single pattern is to be molded, it is attached to the hub ll in amore simple manner.

The t'orm of the Vtaee ot' the plate G is governed by the parting-lineof the patterns; but its thickness should usually be about halt an ineh,Additional strength, in case the holes for the patterns weaken the plateso much as to require it., should he added in the l'orm of a flange, Rf,having a dovetail edge, r, the flange R being so placed as to cause themetal in casting the plate G to run around and grasp the dovetail r,which will cause the flange to support and strengthen the plate to anydesired extent, aecording to its width.

Bushings S, Fig. l, are serewed into the plate the holes in the centerot' said bushings coinciding with and heilig entered by the pins l1 inthe drag, as shown in 'I `ig. 2. The exteriors ol' these bushings areprovided with screw-threads et a uniform size and pitch with those shownon the pin in Fig. '7. These bushings are interchangeable with the saidpins in order to allow the apparatus to be used with either the drag orcope part ot the flask, as may be desired.

Saud being rammed against the plate (1t and the patterns abovedescribed, and the flask and plate being turned over, as shown in Fig.2, the screw N, on being turned in the right direction, will withdrawthe pattern from the sand, after which the box or frame F, together withthe plate, may be removed and the result will beA the drag part of themold, as shown in Fig. (l. \\'hen the form ot the Cope part of the moldis somewhat complicated, ity may be made in the way above described fromanother pattern inelosed in a plate and frame in the saine manner, but,with the reverse side of the pattern exposed to make the impression inthe sand 0f the cope, pins U being inserted in the plate instead of thebushings S, the patterns and plate being otherwise adapted to thatpurpose; but when the Cope side of the @asti ng is comparatively plain,as is the ease in the one shown, it is preferable to use a plate adaptedby the form ot' its surface to form the Cope part of the mold byraniming the sand against it, sueh a plate be ing shown in Fig. 5 ot'the drawings.

This apparatus is especially adapted to be used in connection withmechanism for rammingl the sand and handling the flask, for which reasontirunnions T, attached to the trame F, may be provided.

llaving thus deseribed my invention, what I elaim as new, and desire toseeure by Letters Patent ot' the l'nited States, is-

l. ln a molding apparatus, the plate G, the patterns l), the hub ll,carrying the arms K, and the screws and metal by which the arms areattached to the patterns, the serew N, pivoted in the hub, and the nut aand a frame supporting the nut, substantially as shown and described.

2. lu a molding apparatus, the eombinat ion ot' the plate G, carryingthe patterns D, the frame E, andthe iiiterchangeable pins l and bushingsH.

El. ln a molding apparatus, the Combination ol the trame F, the eoverthe f'rame E, the plate G, the flange R, the patterns l), the arms K,eonneeted to a eentral hub, ll, the screw N, the nut n, and theguidespins l), arranged substantially as described, and f'or the purposespecified.

ln testimony whereof l hereunto af'fix my signature in presence ol' twowitnesses.

lVAl/lER S. \VI'I`HERS.

\\'itnesses:

A. P. \\'oo1 A. A. Woon.

